/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.runners.fnexecution;



import com.bff.gaia.unified.model.pipeline.v1.Endpoints.ApiServiceDescriptor;

import com.bff.gaia.unified.vendor.grpc.v1p13p1.io.grpc.BindableService;

import com.bff.gaia.unified.vendor.grpc.v1p13p1.io.grpc.Server;

import com.bff.gaia.unified.vendor.grpc.v1p13p1.io.grpc.ServerInterceptors;

import com.bff.gaia.unified.vendor.grpc.v1p13p1.io.grpc.inprocess.InProcessServerBuilder;



import java.io.IOException;

import java.util.List;

import java.util.concurrent.atomic.AtomicInteger;



/**

 * A {@link ServerFactory} which creates {@link Server servers} with the {@link

 * InProcessServerBuilder}.

 */

public class InProcessServerFactory extends ServerFactory {

  private static final AtomicInteger serviceNameUniqifier = new AtomicInteger();



  public static InProcessServerFactory create() {

    return new InProcessServerFactory();

  }



  private InProcessServerFactory() {}



  @Override

  public Server allocateAddressAndCreate(

      List<BindableService> services, ApiServiceDescriptor.Builder builder) throws IOException {

    String name = String.format("InProcessServer_%s", serviceNameUniqifier.getAndIncrement());

    builder.setUrl(name);

    InProcessServerBuilder serverBuilder = InProcessServerBuilder.forName(name);

    services.stream()

        .forEach(

            service ->

                serverBuilder.addService(

                    ServerInterceptors.intercept(

                        service, GrpcContextHeaderAccessorProvider.interceptor())));

    return serverBuilder.build().start();

  }



  @Override

  public Server create(List<BindableService> services, ApiServiceDescriptor serviceDescriptor)

      throws IOException {

    InProcessServerBuilder builder = InProcessServerBuilder.forName(serviceDescriptor.getUrl());

    services.stream()

        .forEach(

            service ->

                builder.addService(

                    ServerInterceptors.intercept(

                        service, GrpcContextHeaderAccessorProvider.interceptor())));

    return builder.build().start();

  }

}